However, as Rita got ready to start her night out, Calvin took it as a sign to draw his to a close – and left within minutes of noticing Rita arriving.

A source at the party told The Sun Online: “As soon as Calvin saw that Rita had arrived, he was out of the door.

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Rita and Calvin have had a rocky relationship since their romance broke down in 2014Credit: Getty - Contributor

“They buried the hatchet last year, but it’s obvious that it’s still awkward between them and Calvin just wanted to get out of there.”

He was later spotted at the Universal X BACARDI after-party, chatting with another ex, Ellie Goulding, who he is still pals with.

The pair, who dated briefly in 2014, released single I Will Never Let You Down during their time together.

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The pair's bitter split left Calvin banning Rita from using any songs he worked on her with

Speaking to Marie Claire about their break-up in 2015, Rita revealed: "There was a reason why I split up with him. And there was a reason why I'm at this point in my life where I feel like I have so much musical freedom, and I don't have to explain myself to anybody.

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Rita looked sensational as she celebrated her performance at the Brits last nightCredit: Rex Features

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